The Nationaal Crisis-Comité was founded in November 1931 to support the self-employed and unemployed and those put to work who did not earn a sufficient living. Funds were attracted through fund-raising activities. (The sale of these seals may have been one such fund-raising activity). The committee was dissolved on 2 May 1936 because insufficient funds could be raised.
Local committees were established from 9 December 1931.https://onsamsterdam.nl/amsterdamsch-crisis-comit